Method and device for humidifying mixtures for narcosis



E. SILTEN 2,116,328

METHOD AND DEVICE FOR HUMID IFYING MIXTURES FOR NARCOS IS May 3, 1938.

Filed Dec. 10, 1935 mvsmoa. fkA ar 5/4 7757/,

ATTORNEY.

Patented May 3, 1938 o Sf'l A-T'ES PAT oF=Fi;IcE:

IMETHOD AND DEVICE FOR- HUMIDIFYINGQ IVIIXTURES FOR NARCOSIS Ernst Silten, Berlin, Germany I Applicationhecelnber 10, 1935,,Serial No. 53,707.

Claims.

Thisi invention'l'srelates: to inhalation'zapparatus, morec: particularly'to: an apparatus adapted for producing. narcosis inaipatient, such as by the useof r ether'or the" like.

In an apparatus of this character, it is desirable torheattthe .mixtureiofi the anaesthetic ormedicina'l and air to a sufiicient extent sozthat'the temperature of the mixture .will be comparable tofthe' body temperature: This= is'; desirable: because of 10'- the disturbances: likely; to iOCCllfll'l' the patient :by

reason'lof a low' temperature of: the inhaled: mixture; However; inith'eiieating of the mixtureito the properftemperature; the: relative humidity thereof is considerablydecreased; as can be readily appreciated; bytlierincrease in temperature.

It has been found that. such. a mixture, even.

though at the-proper temperature, may result? in symptoms of'irritation offthe patient; The presentinventionis directed to theelimi+ grna'ti'on of suchdisadvantage and it resides primarilyin the idea that such irritation. may be avoided my: adding to the warmed mixture to be inhaledya sufficient amount of moisture in order to raise the relative humidity to a desired amount. This may be accomplished by causing the warm mixture' to pass over a water surface, whereby. it becomes partially saturated with the water, after which it may-be inhaled. However, in vaporizing the moisture, some drop in temperature may take place, in which case it is desirable to pass the moisture-laden mixture through a warm zone in order to again obtain the desired temperature.

As an alternative, the*mixture"may be firstheated to aw temperature somewhat higher than the final temperature so that ih=vaporizing moisture, the temperature of the mixture will be reduced to the proper point. There is a considerableadvantage in first heating the mixture, as at the higher temperature the vaporization ofwater will b'e'faster and only ashorttiine or a small surface of water will sufiice to give the desired humidity.

In-the' accompanying drawing, constituting a part hereof, and in which like reference characters indicate like parts, the single figure is a side elevational view of a form of apparatus made in accordance with the present invention, some parts being shown in section and some parts being broken away for clearness.

There is provided a receptacle I which may be of glass for a vaporizable organic liquid such as ether, having an opening closed by cap 2. A regulating valve 3 operated by knob 4 has a tube 5 secured thereto, the end of said tube being visible through a sight opening in sleeve 6. Said sleeve communicates with an opening in casing l having ashellliin the upper part-thereofiso po-- sitionedas tocommunicate with*tube 5.: Anairz valve 9 l opening linwardlyr allows-air to be -drawn' into. the system; An outlet: I0=I fromlshell 811-.- is connected to one s end of a-coill IW'hiChiS POSif tioned within and substantially in contact, with 7 an. electrical resistor; heatingrelement l2. The other end l3. of coil 1 I l communicateswith :hollow member I4, to the lower end of which is threaded a bottle or, other container; l5 having water l6 therein. The bottom of casinglis fitted with a cover platev I! on which element l4 rests and which is held in place by cap I8. A tube l9 extends from a pointrbelow the liquid level in container I51: and out, through the top of the casing; A number: of openings 2il -are provided in thelowere end thereof for thepurpose stated below.

The upper end of tube I9 communicates with the. T 2.I"into'whichis fitted a thermometer 22: g At the sidesthereof is secured a-fiexible tube 23 to-the. freexend of-which'is fastened a mask 24 adapted'to be placed over" the face andhaving. an exit tube 25.. Inlet and outlet valves for air mixtures (note shownlare fitted to the mask.

A connection 2B..from one endof resistor 12 is securedw tor. one terminal of: a temperature regulator 21 fitted into and held in plate IT. A connection 28 from'the other'terminal'of saidregulator is secured to a terminal of socket Zircontaining lamp 30. The other terminal of said socketis'connected by Wire 3|. to a source of electricity, which inturnis connected to the opposite end of resistor l2. The lamp 30 is placed in such apositionzas to illuminate the sight opening in sleeve 6.

In order to support the device, I' may, provide a=boss 32Joncap l8 to which a T member 33 having a bar 34" in the side thereof may be held in adjustable position by means of a screw 35held byaawing nut: 3.6. The bar 34 may be secured to any desired support.

The operation of the device is as follows: The valve 3 is adjusted to cause a dripping of the ether from the end of tube 5 at the desired rate. The regulator 21 is set at the proper temperature and the resistor is connected to a source of electricity. The mask 24 is placed over the face of the patient and as breathing starts, air is drawn in through valve 9, mixing with the vapors of ether which have formed due to the elevated temperature within casing 1, and the mixture passes through coil H, being heated to a desired temperature. The mixture passes into container l5 and Sweeps over the surface of the body ofwater 55 l6, passing out through openings 20 in tube IS. The mixture then passes upwardly through said tube and. through a zone of elevated temperature and into T 2|, through tube 23 and into the mask 24. During the heating of element l2, the lamp 30 is lit illuminating the sight opening and making easier the observation of the rate of feed of the ether. The operation of theregulator 2'! to disconnect the resistor will extinguish the lamp 30, thus indicating to the operator that the heat is not on. By reason of experience, he will be able to gauge Whether the connection is broken temporarily because of the temperature within the casing, or whether due to a failure of the apparatus and, if the latter, he will be enabled to take steps to correct the situation.

Although I have described my invention setting forth a single embodiment thereof, it will be apparent to those skilled in the art that various changes in the construction and operation of the device may be made within the scope of the invention. For instance, any type of heat regulator may be used and regulating means may be entirely dispensed with if desired. The positioning of the parts as well as their form, size and structure, may be varied at will. These and other changes may be made in my invention, the scope of which is defined by the claims appended hereto.

What I claim is:

1. An apparatus for use for narcosis or inhalation purposes comprising a'device for feeding a vaporizable organic liquid in predetermined amounts, means for mixing the same with air, an element for heating said mixture and means for introducing moisture into saidmixture including a body of water and means for causing the preheated gaseous mixture to pass over the surface of the same. 7

2. An apparatus for use for narcosis or inhalation purposes comprising a device for feeding a vaporizable organic liquid in predetermined amounts, means for mixing the same with air, an element for heating said mixture and means for introducing moisture into said mixture including a body of Water and means for causing the pre heated gaseous mixture to pass over the surface of the same and means for heating said moist mixture.

3. An apparatus for use for narcosis or inhala- 1 tion purposes comprising a device for feeding a vaporizable organic liquid in predetermined amounts, means for mixing the same with air, an element for heating said mixture and means for introducing moisture into said mixture in eluding a body of Water and means for causing the preheated gaseous mixture to pass over the surface of the same and a temperature regulator responsive to the temperature of said mixture for maintaining the temperature of said mixture constant.

4. An apparatus for use for narcosis or inhalation purposes comprising a receptacle for vaporizable organic liquid, means for feeding liquid into said receptacle, an air inlet in said receptacle, an outlet therefrom, a heating element, a conduit connected to said outlet and in proximity to said heating element, a container for water, the other end of said conduit being connected to said container, and an outlet from said container.

5. An apparatus for use for narcosis or inhalation purposes comprising a receptacle for vaporizable organic liquid, means for feeding liquid into said receptacle, an air inlet in said receptacle, an outlet therefrom, a heating element, a conduit in the form of a coil having one end connected to said outlet and in proximity to said heating element, a container for water, the other end of said conduit being connected to said container, and an outlet from said container.

6. An apparatus for use for narcosis or inhalation purposes comprising a receptacle for vaporizable organic liquid, means for feeding liquid into said receptacle, an air inlet in said receptacle, an outlet therefrom, a heating element, a conduit connected to said outlet'and in proximity to said heating element, a container for water, the other end of said conduit being connected to said container, and an outlet from said container and a tube connected to said latter outlet and in proximity to said heating element.

'7. An apparatus for use for narcosis or inhala-' tion purposes comprising a casing, a receptacle for vaporizable liquid in the upper part thereof,

a heating element in said casing, a container for water in the lower part of said casing, a conduit between said receptacle to said container and adapted to be heated by said element and an outlet from said container.

8. A method of producing a vapor-air mixture for narcosis which comprises mixing a vaporizable organic liquid with air to give a gaseous mixture, thereafter passing said mixture in proximity to a source of heat to warm the same, thereafter causing said mixture to come into contact with Water, and conducting said mixture to an inhalation device.

9. A method of producing a vapor-air mixture for narcosis which comprises mixing a vaporizable organic liquid with air to give a gaseous! mixture, thereafter passing said mixture in proximity to a source of heat to warm the same, thereafter causing said mixture to pass over a body of water, and conducting said mixture to an inhalation device.

10. A method of producing a vapor-air mixture for narcosis which comprises mixing a vaporizable organic liquid with air to give a gaseous mixture, thereafter passing said mixture in proximity to a source of heat to warm the same, thereafter causing said mixture to come into contact with water, then warming said mixture, and

conductingsaid mixture to an inhalation device.

ERNST SILTEN. 

